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High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
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Feb23-13 08:41 AM
ZapperZ
1 21,057
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul11-12 01:13 AM
tom.stoer
178 34,439
So I was thinking what are the differences between ionization and radiation energy loss for particles through a...
Apr4-14 03:03 AM
Lumberjack400
3 510
what is breit wigner distribution function ? it is used in resonance scan means it decides the no of events for any...
Apr3-14 07:58 AM
Einj
7 593
In beta decay, is the W boson created by the change of a quark or does it cause the change? Also, I don't fully...
Apr2-14 05:31 PM
mfb
8 541
I am currently confused... I read that we don't know yet where does the proton spin come from. But I wonder... 1)...
Apr2-14 11:46 AM
Vanadium 50
14 809
P.W. Anderson in his essay "more is different" said that: "no stationary state of a system has an electric dipole...
Apr2-14 09:41 AM
Bill_K
1 368
In the process of particle decay (eg carbon-14 ---> nitrogen-14), is there any relations with radioactivity? Is it...
Mar31-14 12:43 PM
mfb
6 552
I think this is more or less a quick question. So deuteron (pn) is an isosinglet in the state |00>...
Mar31-14 05:04 AM
Bill_K
1 454
There are many other particles having a larger nucleus than carbon-14 but they are stable. Why? Why is carbon-14...
Mar30-14 05:46 PM
mfb
6 470
Hi everyone. I was trying to reproduce the calculation needed to include the QCD correction to the low energy...
Mar29-14 01:57 PM
p-brane
3 542
Hi, I was just trying to draw a Feynman diagram for ψ' to χ_{c} states. So we have a electromagnetic transition. ...
Mar29-14 08:09 AM
mfb
1 393
Hi, I am looking into symmetry breaking and how it (may have) affected the photon/baryon ratio in the primordial...
Mar29-14 07:53 AM
nSlavingBlair
5 630
This question is probably very over-simplistic, however: if neutrinos are majorana particles, which are their own...
Mar29-14 07:23 AM
lizzie96
4 428
Hi everyone, I have a doubt on Fierz identities. If we define the following quantities: S=1,\; V=\gamma_\mu,\;...
Mar27-14 12:30 PM
Einj
2 432
Assume that, in cartesian coordinate, we have a quark with momentum ##k=(k_0,0,k_0sin\theta,k_0\cos\theta)## and a...
Mar26-14 10:24 PM
Chenkb
0 443
I'm a little confused about whether the higgs boson is the mediator of the higgs field. I haven't had a chance to...
Mar26-14 09:27 PM
Simon Bridge
31 2,255
Hi, I'm trying to understand the process in the Feynman diagram below: http://i.imgur.com/K6OO2jp.png ...
Mar26-14 08:52 AM
Hepth
9 414
Hello. My teacher and I have had this very intense debate for quite some time now and we need your opinion on this...
Mar25-14 04:30 PM
fakecop
6 510
Hi I am having trouble following the derivation of the fermionic oscillator partition function in zeta function...
Mar25-14 03:52 PM
sgd37
0 414
Hi, I've been reading about Feynman diagrams lately and I'm trying to understand the pair annihilation diagram. The...
Mar25-14 04:46 AM
ChrisVer
5 513
Various astrophysical processes produce antineutrinos, which then fly off into outer space. I assume there are pretty...
Mar25-14 04:02 AM
ofirg
11 486
Current main stream theory is neutrinos must have mass. Recent paper claims its on the order of 5 to 50 eV (I've...
Mar24-14 05:38 AM
phyzguy
9 581
If an electrically charged particle is a scalar, and a magnetically charged particle is a pseudoscalar, then what is a...
Mar23-14 05:43 PM
bsaucer
2 378
For a 2nd order electron-positron scattering, the following diagrams are possible:...
Mar22-14 06:05 PM
daca
15 943
I am not sure whether this belongs here or not, but I'll try this topic insteed of SR+GR I was wondering, since...
Mar22-14 12:41 PM
ChrisVer
7 447
why massless particle, such as photon, can only have two helicity states? Photon's helicity is 1,-1. Helicity zero is...
Mar21-14 02:43 PM
samalkhaiat
4 559
Hi, all. Could anyone recommend some good software for modeling nuclear physics? I have concept nuclear rocket that I...
Mar21-14 10:37 AM
KarenRei
0 365
If gauge symmetries are really just redundancies in our description accounting for nonphysical degrees of freedom,...
Mar20-14 12:38 PM
ChrisVer
11 860
Hi guys, I am currently trying to figure out the best way to create a target of deuterated polyethylene for neutron...
Mar19-14 04:05 PM
CFlower
0 497
Say a uranium-238 nucleus with angular momentum II decays to thorium-234 plus an alpha particle. Will the sum of the...
Mar19-14 10:33 AM
dauto
2 465
Hi, I am self-teaching Quantum Elctrodynamics, and have come across something which I do not understand. I would...
Mar19-14 08:35 AM
boltzman1969
2 491
I know what gauge invariance is, but I'm not sure what gauge covariance is. Is it that a given field has a gauge...
Mar17-14 02:10 AM
tom.stoer
14 2,481
Hello, there are several papers on QCD in Hamiltonian formulation, especially in Coulomb gauge. Unfortunately the...
Mar15-14 01:03 PM
tom.stoer
2 564
Dear all; why we study hadron physics? For instance different people calculates the decay constant of mesons using...
Mar14-14 01:08 PM
mfb
1 565
In atomic bomb there are two hemispheres of fission material (Uranium or Plutonium), they are joined by means of...
Mar13-14 08:48 AM
Eagle9
5 639
Hi folks -- I have three questions on Montonen-Olive duality. This duality switches the electric and magnetic...
Mar12-14 10:24 AM
metroplex021
0 494
"Antimatter gravity could explain Universe's expansion:" http://phys.org/news/2011-04-antimatter-gr...-expansion.html...
Mar11-14 03:41 PM
mfb
26 3,360
Hey there, Does anyone have a table will all the particles and their respective spin, lepton number, mass, etc etc?...
Mar11-14 01:16 PM
Strange
4 476
Hi everyone, I have a doubt which was actually raised by a recent discussion on this forum. We know that Furry's...
Mar11-14 09:52 AM
Vanadium 50
2 451
Dear all When we calculating the cross section of particles, we apply the trace calculation. This is not clear for...
Mar11-14 08:56 AM
dauto
2 474
If we scatter unpolarized electrons off each other and we calculate the amplitude for electrons to scatter into final...
Mar11-14 08:24 AM
Einj
4 460

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